i took apart both a ls and gsr oil pump to see if there was a visible difference.....i couldnt find one. The only thing that is could think of being different is the spring. But even that felt to be the same(not a real accurate measurement). Here are some pics......

the gsr oil pump is to the left

this is close up of an ls oil pump

this is gsr

 

cant remember from the top of my head what the flow differences were, but the springs have different pressures, the gsr one is stiffer, thus aloowing higher pressure

 

ok that is understandable but why are some people saying it flows more at the same pressure?

 

no it just has more pressure.
But newer pumps all flow the same

 

so all that is different is the spring. I wish you could buy just the spring fropm the dealer.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philipwight &raquo;</TD></TR><TR><TD CLASS="quote">so all that is different is the spring. I wish you could buy just the spring fropm the dealer. </TD></TR></TABLE>

you can:
http://www.acuraautomotivepart...y.jsp

 

NICE! well that it cool. Thanks.

That will get my ls/vtec one step closer. I dont want to use my gsr oil pump because that will be running soon.

 

yes the gsr pump flows more volume at the same pressure

 

B18C and B18C5 are 71 liters/min, B18B's are 50 litres/min.
96-up all the same

the only difference is the spring

 

Are there any differences in the gear like # of teeths, size, shape, etc? Why do people sell aftermarket gears?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">B18C and B18C5 are 71 liters/min, B18B's are 50 litres/min.
96-up all the same

the only difference is the spring
</TD></TR></TABLE>

wut about B16A oil pump?

 

interesting thread. any updates?

which model pumps are we supposed to upgrade to exactly? some have the same part numbers..

 

i got a type-r from an integra for my b16,i was told that it will work..i havnt tried installing it yet..i know some have different size gears like 80mm to 84mm or something like that...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">

the only difference is the spring
</TD></TR></TABLE>

I just looked up the part numbers in my electronic parts catalog for the spring, and they are all the same

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fox297 &raquo;</TD></TR><TR><TD CLASS="quote">Are there any differences in the gear like # of teeths, size, shape, etc? Why do people sell aftermarket gears?</TD></TR></TABLE>

the stock oil pump gear is made out of a brittle metal
the aftermarket pieces are much more durable

 

yeah, all the parts #'s are the same, because all newer oil pumps are the same.
flow differences existed in the older obd1 ones

 

when you go to todaracing.com and look at there oil pump gears they ask you to measure the gears to make sure you get the correct parts..

 

isnt one 80mm and the other like 2 or 4mm differant in size? i think aftermarket companies sell 2 sizes.

 

so if i just order just the spring, my ls oil pump will performe like a gsr oil pump?

 

no

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by javenger &raquo;</TD></TR><TR><TD CLASS="quote">so if i just order just the spring, my ls oil pump will performe like a gsr oil pump?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">no</TD></TR></TABLE>
if the spring is the only difference, then why not?

 

ahhhh someone with real knowledge please give a response and the reason why. i want to know what to use for my ls turbo. I have a stock ls pump, it will be replaced either by a new obd 1 ls/gsr/type r depending on the advantages or disadvantages.
some one who can back up there knowledge

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by incredteg3 &raquo;</TD></TR><TR><TD CLASS="quote">ahhhh someone with real knowledge please give a response and the reason why. i want to know what to use for my ls turbo. I have a stock ls pump, it will be replaced either by a new obd 1 ls/gsr/type r depending on the advantages or disadvantages.
some one who can back up there knowledge </TD></TR></TABLE>

I agree this is a very interesting thread. If i knew all i needed to buy was a spring, i would be alot happier.

So early ls oil pumps just need the high psi spring that comes in pre-96 gsr's and all bseries after 96. Correct?

 

bump?
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by javenger &raquo;</TD></TR><TR><TD CLASS="quote">so if i just order just the spring, my ls oil pump will performe like a gsr oil pump?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PrettyLude &raquo;</TD></TR><TR><TD CLASS="quote">no</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LSvtec03 &raquo;</TD></TR><TR><TD CLASS="quote">if the spring is the only difference, then why not?</TD></TR></TABLE>